William e



N. FErEm PMoro-QTHOGRAPHER, WASHINGTON, :1,04

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Letters Patent No. 77,348, dated April 28, 1868.

IMPROVEMENT IN .IIB-BOOMS.

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TO ALL WHOM IT MAY CONOERN:

Be it known that I, WILLIAM E. BEMAN, of' Portland, in the county ofCumberland, State of Maine, have invented a. new and Auseful ImprovedJib-Boom; and I hereby declare the following to be a full, clear, andexact description thereof, which will enable Aothers to make und use myinvention, reference being had to the accompunying' drawings, formingpart of this specification, in which is shown a side elevation' ot'same.

When merchant-vessels are in u crowded harbor,` economy of space isamutter of greutimpoi'tance, and ship-masters are required, by theregulations of many of these ports, to ship the yards and booms, whichwould otherwise overhang the quay and water, and obstruct thetransportation of merchandise or the passage of other vessels to andfrom their Vplaces at the wharf.

I My invention has special reference to an easy and simple method ofunshipping thejib-boom. This operation, as at present performed,requires the labor of a number of men for a. length of time varying fromtwoA hours to half a day; for it is necessary to remove all the'staysfrom the boom and draw it through the bees upon the deck, where itoccupies much valuable space. By the use of my device, two men canperform the wor-k in much less time, and, moreover, the boom,-when onboard the vessel, is so placed as not to interfere with the variousoperations on deck. I

The drawings may be readily explained. At the outer end of the bowsprit,I place a. cap, a, through which thejib-boom passes when in place, as atI). 'Ihis cap is so arranged as to open upon a hinged joint, d, in theside ofthe same, as shown more fully at c. It is secured, when shut, bya. pin, z, passed through corresponding holes e e in the upper and lowerportion of it, or by Vany convenient device.

' The jib-boom b is secured at its inner end, by a. horizontal joint, tothe bowsprit' ofthe vessel, orto a. step bolted tl'1ereto,'scen at f.When it is necessary to ship this boom, the pin 7c is withdrawn, the capthrown up, and by the application oi' a block and tackle the boom may bedrawn up to a perpendicular positionfand secured asis shown at b. It isnot at all necessary to remove the stays and rigging, as is the easewith the ordinary boom, for it passes between those attached tothebowsprit on either side of the same, and carries up with it thosefastened to the boom itseli` I am aware of the patent of D. W. Norcross,Deeomber'27, 1864, No. 45,625, on a boom or griff-joint, at thejunctionof the said boom or gait' to the mast, and I donot claim a boom orgaiT-joint with a triple motion, nor

swivel with :x bracket er grooved rail, nor combining with a. boom orgift` a joint universal. The purpose and structure of this invention aredifferent from mine. My invention could not be applied to a boom orgaiinits connection with a mast, because it admits of no lateral motion, butis intended solely for the application herein shown, viz, fora-jib-hooin thus connected with the bowspri't, for the purpose ofobviating the inconvenience of shipping thejib-boom in on deck or out,through the'ordinary caps, as customary.

What I claim as my invention, and desire to secure by Letters Patent, isThe jib-boom a, when hinged to the bowsprit in the manner herein setforth, and fortne purpose specied.

, WILLIAM E. BEMAN. Witnesses:

WM. AFRANK SEAVEY, -HENRY C. HOUSTON.

